There was definitely a learning curve applying this, especially for tiny little rectangles on French doors! But once I figured it out, it was actually easy. The hardest part was cutting it to make sure I get even rectangles for each spot. I feel confident installing this anywhere now. And I feel if you have just one big piece, you can do this easily in less than an hour. It took time about 2-3 hrs for me because of the cutting and spraying and squeegee-ing each rectangle. But I like the look of it. Perfect for privacy!